DeWalt DCM571 User Manual

DCM571

English (original instructions) 4

Copyright DeWA LT

B

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Figure B Figure C

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Figure D

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Figure E

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Figure F

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Figure G

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Figure K

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Figure L

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Figure M

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Figure N

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610mm

Figure P

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Figure S

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3

English

STRING TRIMMER / BRUSH CUTTER
DCM571

Congratulations!

You have chosen a DeWALT tool. Years of experience, thorough
product development and innovation make DeWALT one of the
most reliable partners for professional power toolusers.

Technical Data

Batteries & Chargers sold separately

DCM571

Voltage V

UK & Ireland V

Type 1

Power output W

RPM /min

Cutting Swath Size mm

Weight (without battery pack) kg

Brush cutter

Type

RPM /min

Cutting Swath Size mm

Noise values and vibration values (triax vector sum).
String trimmer mode according to EN 50636-2-91:

LPA (emission sound pressure level)

LWA (sound power level)

K (uncertainty for the given sound

level)

Vibration emission value ah =

- Handle

- Auxiliary Handle

Uncertainty K =

DC

DC

dB(A) 79

dB(A) 94

dB(A) 1.0

2

m/s

2

m/s

2

m/s

54V

54V

220-240

0-5100 / 0-5500

380

4.6

Tri-Blade Brush Knife,

Grass Cutting Blade,

4T Grass Cutting Blade

0-5100 / 0-5500

255

<2.5

2.6

1.5

Noise values and vibration values (triax vector sum).
Brush cutter mode according to EN ISO 11806-1::

LPA (emission sound pressure level)

LWA (sound power level)

K (uncertainty for the given sound

level)

Vibration emission value ah =

- Handle

- Auxiliary Handle

Uncertainty K =

The vibration emission level given in this information sheet
has been measured in accordance with a standardised test
given in EN 50636 and may be used to compare one tool
with another. It may be used for a preliminary assessment
ofexposure.

WARNING: The declared vibration emission level
represents the main applications of the tool. However if



the tool is used for different applications, with different
accessories or poorly maintained, the vibration
emission may differ. This may significantly increase the
exposure level over the total workingperiod.

An estimation of the level of exposure to vibration
should also take into account the times when the tool
is switched off or when it is running but not actually
doing the job. This may significantly reduce the
exposure level over the total workingperiod.

Identify additional safety measures to protect the
operator from the effects of vibration such as:
maintain the tool and the accessories, keep the hands
warm, organisation of workpatterns.

NOTE: National regulation can restrict the use of the
machine.

dB(A) 78.5

dB(A) 94

dB(A) 1.8

2

m/s
m/s
m/s

2

2

<2.5

10.1

1.5

Batteries Chargers/Charge Times (Minutes)

Cat # V

DCB546 18/54 6.0/2.0 1.05 270 140 90 60 90 X
DCB547 18/54 9.0/3.0 1.25 420 220 140 85 140 X
DCB181 18 1.5 0.35 70 35 22 22 22 45

DCB182 18 4.0 0.61 185 100 60 60 60 120
DCB183/B 18 2.0 0.40 90 50 30 30 30 60
DCB184/B 18 5.0 0.62 240 120 75 75 75 150

DCB185 18 1.3 0.35 60 30 22 22 22 X

DCB187 18 3.0 0.48 140 70 45 45 45 90

4

DC

Weight

Ah

DCB107 DCB113 DCB115 DCB118 DCB132 DCB119

kg

English

EC-Declaration of Conformity

Machinery Directive

STRING TRIMMER / BRUSH CUTTER
DCM571

DeWALT declares that these products described under

Technical Data are in compliance with:
2006/42/EC, EN60335-1:2012 + A11:2014 EN50636-2­91:2014, EN ISO 11806-1:2011.

2000/14/EC, Lawn Trimmer, L ≤ 50 cm, Annex VI
DEKRA Certification B.V.
Meander 1051 / P.O. box 5185
6525 MJ ARNHEM / 6802 ED
ARNHEM, Netherlands
Notified Body ID No.: 0344

Level of accoustic power according to 2000/14/EC

(Article 12, Annex III, L ≤ 50 cm):

L

(measured sound pressure) 79 dB(A)

PA

uncertainty (K) = 1.0 dB (A)

L

(guaranteed sound power) 96 dB(A)

These products also comply with Directive 2014/30/EU and
2011/65/EU. For more information, please contact D
at the following address or refer to the back of the manual.

The undersigned is responsible for compilation of the
technical file and makes this declaration on behalf
ofD

WA

eWALT

eWALT.

CAUTION: Indicates a potentially hazardous situation
which, if not avoided, may result in minor or



moderateinjury.
NOTICE: Indicates a practice not related to

personal injury which, if not avoided, may result in
propertydamage.

Denotes risk of electricshock.



Denotes risk offire.



SAFETY INSTRUCTIONS

WARNING: When using mains-powered appliances,
basic safety precautions, including the following,



should always be followed to reduce the risk of fire,
electric shock, personal injury and material damage.

WARNING: When using the machine the safety rules
must be followed. For your own safety and bystanders



please read these instructions before operating the
machine. Please keep the instructions safe for later use.

• Read all of this manual carefully before operating the appliance.

• The intended use is described in this manual. The use of any
accessory or attachment or the performance of any operation
with this appliance other than those recommended in this
instruction manual may present a risk of personal injury.

• Retain this manual for future reference.

IMPORTANT

READ CAREFULLY BEFORE USE
KEEP FOR FUTURE REFERENCE

SAFE OPERATING PRACTICES

Markus Rompel
Director Engineering
DeWALT, Richard-Klinger-Straße 11,
D-65510, Idstein, Germany

10.11.2016

WARNING: To reduce the risk of injury, read the
instruction manual.

Definitions: Safety Guidelines

The definitions below describe the level of severity for each
signal word. Please read the manual and pay attention to
thesesymbols.

DANGER: Indicates an imminently hazardous
situation which, if not avoided, will result in death or



seriousinjury.
WARNING: Indicates a potentially hazardous

situation which, if not avoided, could result in death



or seriousinjury.

Training

a ) Read the instructions carefully. Be familiar with the

controls and the correct use of the machine.

b ) Never allow children or people unfamiliar with

these instructions to use the machine. Local
regulations can restrict the age of the operator.

c ) Keep in mind that the operator or user is responsible

for accidents or hazards occurring to other people or
their property.

Preparation

a ) Before use, always visually inspect the machine for

damaged, missing or misplaced guards or shields.

b ) Never operate the machine while people, especially

children, or pets are nearby.

c ) The brush cutter blade has sharp edges. Wear

gloves when handling blade

Operation

a ) Wear eye protection and stout shoes at all times while

operating the machine.

5

English

b ) Avoid using the machine in bad weather conditions

especially when there is a risk of lightning.
c ) Use the machine only in daylight or good artificial light.
d ) Never operate the machine with damaged guards or

shields or without guards or shields in place.
e ) Switch on the motor only when the hands and feet are

away from the cutting means.
f ) Always disconnect the machine from the power

supply (i.e. remove the plug from the mains, remove

the disabling device or removable battery)

ʵ whenever the machine is left unattended;
ʵ before clearing a blockage;
ʵ before checking, cleaning or working on the machine;
ʵ after striking a foreign object;
ʵ whenever the machine starts vibrating abnormally.

g ) Take care against injury to feet and hands from the

cutting means.
h ) Always ensure that the ventilation openings are kept

clear of debris.
i ) When using the brush cutter there is a risk of

kickback if it contacts a solid object (tree trunk,

branch, or rock). The unit will kick to the opposite

direction of the brush cutter blade's rotation.
j ) Remove any objects that may cause kickback, such as

branches and rocks.
k ) Check for loose fasteners and damaged parts, such as

cracks in the cutting attachment.

Maintenance and storage

a ) Disconnect the machine from the power supply

(i.e. remove the plug from the mains, remove the

disabling device or removable battery) before carrying

out maintenance or cleaning work.
b ) Use only the manufacturer’s recommended

replacement parts and accessories.
c ) Inspect and maintain the machine regularly. Have

the machine repaired only by an authorized repairer.
d ) When not in use, store the machine out of the reach

of children.
e ) Use blade cover for metal blades during transport and

storage.
f ) Clean before storing, including the use of guards on

cutting attachments with metal blades.

ADDITIONAL SAFETY INSTRUCTIONS FOR
GRASS TRIMMERS / BRUSH CUTTERS

WARNING: Cutting elements continue to rotate

after the motor is switched off.



• Wear long trousers to protect your legs.

• Before using the appliance, check that your cutting path is
free from sticks, stones, wire and any other obstacles.

• Only use the appliance in the upright position, with the
cutting line near the ground. Never switch the appliance
on in any other position.

• Move slowly when using the appliance. Be aware that
freshly cut grass is damp and slippery.

• Do not work on steep slopes. Work across the face of
slopes, not up and down.

• Never cross gravel paths or roads while the appliance is
running.

• Never touch the cutting line while the appliance is running.

• Do not put the appliance down until the cutting line has
come to a complete standstill.

• Use only the appropriate type of cutting line. Never use
metal cutting line or fishing line.

• Keep hands and feet away from the cutting line and blade
at all times, especially when switching on the motor.

• Before using the appliance and after any impact, check for
signs of wear or damage and repair as necessary.

• Take care against injury from any device fitted for
trimming the filament line length. After extending new
cutter line always return the machine to its normal
operating position before switching on.

• Close supervision is necessary when the appliance is used
near children.

• This appliance is not intended for use by young or infirm
persons without supervision.

• This appliance is not to be used as a toy.

• Use in a dry location only. Do not allow the appliance to
become wet.

• Do not immerse the appliance in water.

• Do not open the body casing. There are not user­serviceable parts inside

• Do not operate the appliance in explosive atmospheres,
such as in the presence of flammable liquids, gases or dust.

• When the appliance is stored or transported in a vehicle
it should be placed in the boot or restrained to prevent
movement following sudden changes in speed or direction.

• When not in use, the appliance should be stored in a dry,
well ventilated place out of reach of children.

• Children should not have access to stored appliances.

Safety of Others

• This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.

• Children must be supervised to ensure that they do not
play with the appliance.

6

English

Residual Risks

To ensure you have good footing on slopes, do not
overreach. Keep your balance at all times. Always walk, do
not run.

Additional residual risks may arise when using the tool
which may not be included in the enclosed safety warnings.
These risks can arise from misuse, prolonged use etc.

Even with the application of the relevant safety regulations
and the implementation of safety devices, certain residual
risks can not be avoided. These include:

• Injuries caused by touching any rotating/moving parts.

• Injuries caused when changing any parts, blades or
accessories.

• Injuries caused by prolonged use of a tool. When using any
tool for prolonged periods ensure you take regular breaks.

• Impairment of hearing.

• Health hazards caused by breathing dust developed when
using your tool (example: working with wood, especially
oak, beech and MDF.)

Electrical Safety

The electric motor has been designed for one voltage only.
Always check that the battery pack voltage corresponds
to the voltage on the rating plate. Also make sure that the
voltage of your charger corresponds to that of yourmains.

Your DeWALT charger is double insulated in
accordance with EN60335; therefore no earth wire
isrequired.

WARNING: 115 V units have to be operated via a
fail-safe isolating transformer with an earth screen



between the primary and secondary winding.

If the supply cord is damaged, it must be replaced by a
specially prepared cord available through the D
serviceorganisation.

Mains Plug Replacement
(U.K. & Ireland Only)

If a new mains plug needs to be fitted:

• Safely dispose of the oldplug.

• Connect the brown lead to the live terminal in theplug.

• Connect the blue lead to the neutralterminal.

WARNING: No connection is to be made to the
earthterminal.



Follow the fitting instructions supplied with good quality
plugs. Recommended fuse: 3A.

Using an Extension Cable

An extension cord should not be used unless absolutely
necessary. Use an approved extension cable suitable for
the power input of your charger (see Technical Data). The
minimum conductor size is 1mm
is30m.

When using a cable reel, always unwind the
cablecompletely.

2

; the maximum length

eWALT

SAVE THESE INSTRUCTIONS

Chargers

DeWALT chargers require no adjustment and are designed
to be as easy as possible tooperate.

Important Safety Instructions for All
Battery Chargers

SAVE THESE INSTRUCTIONS: This manual contains
important safety and operating instructions for compatible
battery chargers (refer to TechnicalData).

• Before using charger, read all instructions and cautionary
markings on charger, battery pack, and product using
batterypack.

WARNING: Shock hazard. Do not allow any liquid to
get inside charger. Electric shock mayresult.



WARNING: We recommend the use of a residual
current device with a residual current rating of 30mA



orless.
CAUTION: Burn hazard. To reduce the risk of injury,

charge only DeWALT rechargeable batteries. Other



types of batteries may burst causing personal injury
anddamage.

CAUTION: Children should be supervised to ensure
that they do not play with theappliance.



NOTICE: Under certain conditions, with the charger
plugged into the power supply, the exposed charging
contacts inside the charger can be shorted by foreign
material. Foreign materials of a conductive nature
such as, but not limited to, steel wool, aluminum foil or
any buildup of metallic particles should be kept away
from charger cavities. Always unplug the charger from
the power supply when there is no battery pack in the
cavity. Unplug charger before attempting to clean

• DO NOT attempt to charge the battery pack with

any chargers other than the ones in this manual.

The charger and battery pack are specifically designed to
worktogether.

• These chargers are not intended for any uses other

than charging D

Any other uses may result in risk of fire, electric shock
orelectrocution.

• Do not expose charger to rain orsnow.

• Pull by plug rather than cord when disconnecting
charger. This will reduce risk ofdamage to electric plug
andcord.

• Make sure that cord is located so that it will not be

stepped on, tripped over, or otherwise subjected to
damage orstress.

• Do not use an extension cord unless it is absolutely
necessary. Use of improper extension cord could result in

risk of fire,electric shock, orelectrocution.

eWALT rechargeable batteries.

7

English

• Do not place any object on top of charger or place
the charger on a soft surface that might block the
ventilation slots and result in excessive internal heat.

Place the charger in a position away from any heat source.
The charger is ventilated through slots in the top and the
bottom of thehousing.

• Do not operate charger with damaged cord or
plug—have them replacedimmediately.

• Do not operate charger if it has received a sharp

blow, been dropped, or otherwise damaged in any
way. Take it to an authorised servicecentre.

• Do not disassemble charger; take it to an authorised
service centre when service or repair is required.

Incorrect reassembly may result in a risk of electric shock,
electrocution orfire.

• In case of damaged power supply cord the supply cord
must be replaced immediately by the manufacturer,
its service agent or similar qualified person to prevent
anyhazard.

• Disconnect the charger from the outlet before

attempting any cleaning. This will reduce the risk of
electric shock. Removing the battery pack will not reduce

thisrisk.

• NEVER attempt to connect two chargerstogether.

• The charger is designed to operate on standard

230V household electrical power. Do not attempt to
use it on any other voltage. This does not apply to the

vehicularcharger.

Charging a Battery (Fig. B)

1. Plug the charger into an appropriate outlet before
inserting battery pack.

2. Insert the battery pack
the battery pack is fully seated in the charger. The red
(charging) light will blink repeatedly indicating that the
charging process has started.

3. The completion of charge will be indicated by the red
light remaining ON continuously. The battery pack is
fully charged and may be used at this time or left in the
charger. To remove the battery pack from the charger,
push the battery release button

NOTE: To ensure maximum performance and life of lithium­ion battery packs, charge the battery pack fully before first use.

14

into the charger, making sure

15

on the battery pack.

Charger Operation

Refer to the indicators below for the charge status of the
battery pack.

Charge Indicators

Charging

Fully Charged

Hot/Cold Pack Delay*

* The red light will continue to blink, but a yellow indicator

light will be illuminated during this operation. Once the
battery pack has reached an appropriate temperature, the
yellow light will turn off and the charger will resume the
charging procedure.

The compatible charger(s) will not charge a faulty battery
pack. The charger will indicate faulty battery by refusing to
light or by displaying problem pack or charger blink pattern.

NOTE: This could also mean a problem with a charger.
If the charger indicates a problem, take the charger and

battery pack to be tested at an authorised service centre.

Hot/Cold Pack Delay

When the charger detects a battery pack that is too hot
or too cold, it automatically starts a Hot/Cold Pack Delay,
suspending charging until the battery pack has reached an
appropriate temperature. The charger then automatically
switches to the pack charging mode. This feature ensures
maximum battery pack life.

A cold battery pack will charge at a slower rate than a warm
battery pack. The battery pack will charge at that slower rate
throughout the entire charging cycle and will not return to
maximum charge rate even if the battery pack warms.

The DCB118 charger is equipped with an internal fan
designed to cool the battery pack. The fan will turn on
automatically when the battery pack needs to be cooled.
Never operate the charger if the fan does not operate
properly or if ventilation slots are blocked. Do not permit
foreign objects to enter the interior of the charger.

Electronic Protection System

XR Li-Ion tools are designed with an Electronic Protection
System that will protect the battery pack against
overloading, overheating or deep discharge.

The tool will automatically turn off if the Electronic
Protection System engages. If this occurs, place the lithium­ion battery pack on the charger until it is fully charged.

Wall Mounting

These chargers are designed to be wall mountable or to sit
upright on a table or work surface. If wall mounting, locate
the charger within reach of an electrical outlet, and away
from a corner or other obstructions which may impede
air flow. Use the back of the charger as a template for the
location of the mounting screws on the wall. Mount the
charger securely using drywall screws (purchased separately)
at least 25.4mm long with a screw head diameter of
7–9mm, screwed into wood to an optimal depth leaving
approximately 5.5mm of the screw exposed. Align the slots
on the back of the charger with the exposed screws and fully
engage them in the slots.

Charger Cleaning Instructions

WARNING: Shock hazard. Disconnect the charger
from the AC outlet before cleaning. Dirt and grease



may be removed from the exterior of the charger using a

8

English

cloth or soft non-metallic brush. Do not use water or any
cleaning solutions. Never let any liquid get inside the tool;
never immerse any part of the tool into a liquid.

Battery Packs

Important Safety Instructions for All
Battery Packs

When ordering replacement battery packs, be sure to
include catalog number and voltage.

The battery pack is not fully charged out of the carton.
Before using the battery pack and charger, read the safety
instructions below. Then follow charging procedures
outlined.

READ ALL INSTRUCTIONS

• Do not charge or use battery in explosive
atmospheres, such as in the presence of flammable
liquids, gases or dust. Inserting or removing the battery

from the charger may ignite the dust or fumes.

• Never force battery pack into charger. Do not modify

battery pack in any way to fit into a non-compatible
charger as battery pack may rupture causing serious
personal injury.

• Charge the battery packs only in D

• DO NOT splash or immerse in water or other liquids.

• Do not store or use the tool and battery pack in

locations where the temperature may reach or
exceed 40 ˚C (104 ˚F) (such as outside sheds or metal
buildings in summer).

• Do not incinerate the battery pack even if it is severely
damaged or is completely worn out. The battery pack

can explode in a fire. Toxic fumes and materials are created
when lithium-ion battery packs are burned.

• If battery contents come into contact with the skin,
immediately wash area with mild soap and water. If
battery liquid gets into the eye, rinse water over the open
eye for 15 minutes or until irritation ceases. If medical
attention is needed, the battery electrolyte is composed of
a mixture of liquid organic carbonates and lithium salts.

• Contents of opened battery cells may cause
respiratory irritation. Provide fresh air. If symptoms
persists, seek medical attention.

WARNING: Burn hazard. Battery liquid may be
flammable if exposed to spark or flame.



WARNING: Never attempt to open the battery pack
for any reason. If battery pack case is cracked or



damaged, do not insert into charger. Do not crush,
drop or damage battery pack. Do not use a battery
pack or charger that has received a sharp blow, been
dropped, run over or damaged in any way (i.e., pierced
with a nail, hit with a hammer, stepped on). Electric
shock or electrocution may result. Damaged battery
packs should be returned to service centre for recycling.

eWALT chargers.

WARNING: Fire hazard. Do not store or carry the
battery pack so that metal objects can contact



exposed battery terminals. For example, do not
place the battery pack in aprons, pockets, tool boxes,
product kit boxes, drawers, etc., with loose nails,
screws, keys, etc.

CAUTION: When not in use, place tool on its side
on a stable surface where it will not cause a



tripping or falling hazard. Some tools with large
battery packs will stand upright on the battery pack
but may be easily knocked over.

Transportation

WARNING: Fire hazard. Transporting batteries can
possibly cause fire if the battery terminals inadvertently



come in contact with conductive materials. When
transporting batteries, make sure that the battery
terminals are protected and well insulated from materials
that could contact them and cause a short circuit.

D

eWALT batteries comply with all applicable shipping

regulations as prescribed by industry and legal standards
which include UN Recommendations on the Transport of
Dangerous Goods; International Air Transport Association
(IATA) Dangerous Goods Regulations, International Maritime
Dangerous Goods (IMDG) Regulations, and the European
Agreement Concerning The International Carriage of
Dangerous Goods by Road (ADR). Lithium-ion cells and
batteries have been tested to section 38.3 of the UN
Recommendations on the Transport of Dangerous Goods
Manual of Tests and Criteria.

In most instances, shipping a D
excepted from being classified as a fully regulated Class 9
Hazardous Material. In general, only shipments containing
a lithium-ion battery with an energy rating greater than
100 Watt Hours (Wh) will require being shipped as fully
regulated Class 9. All lithium-ion batteries have the Watt
Hour rating marked on the pack. Furthermore, due to
regulation complexities, D
shipping lithium-ion battery packs alone regardless of Watt
Hour rating. Shipments of tools with batteries (combo kits)
can be air shipped as excepted if the Watt Hour rating of the
battery pack is no greater than 100 Whr.

Regardless of whether a shipment is considered excepted
or fully regulated, it is the shipper's responsibility to consult
the latest regulations for packaging, labeling/marking and
documentation requirements.

The information provided in this section of the manual is
provided in good faith and believed to be accurate at the
time the document was created. However, no warranty,
expressed or implied, is given. It is the buyer’s responsibility
to ensure that its activities comply with the applicable
regulations.

eWALT battery pack will be

eWALT does not recommend air

9

English

Transporting the FLEXVOLT

The D

eWALT FLEXVOLT

TM

Battery

TM

battery has two modes: Use and

Transport.
Use Mode: When the FLEXVOLT

in a DeWALT 18V product, it will operate as an 18V battery.
When the FLEXVOLT

TM

battery is in a 54V or a 108V (two 54V

TM

battery stands alone or is

batteries) product, it will operate as a 54V battery.
Transport Mode: When the cap is attached to the

TM

FLEXVOLT

battery, the battery is in Transport mode. Keep

the cap for shipping.
When in Transport mode,

strings of cells are electrically
disconnected within the
pack resulting in 3 batteries
with a lower Watt hour (Wh) rating as compared to 1 battery
with a higher Watt hour rating. This increased quantity of 3
batteries with the lower Watt hour rating can exempt the
pack from certain shipping regulations that are imposed
upon the higher Watt hour batteries.

For example, the

Example of Use and Transport Label Marking

Transport Wh rating
might indicate 3x36
Wh, meaning 3
batteries of 36 Wh each.
The Use Wh rating might indicate 108Wh (1battery implied).

Storage Recommendations

1. The best storage place is one that is cool and dry
away from direct sunlight and excess heat or cold. For
optimum battery performance and life, store battery
packs at room temperature when not in use.

2. For long storage, it is recommended to store a fully
charged battery pack in a cool, dry place out of the
charger for optimal results.

NOTE: Battery packs should not be stored completely
depleted of charge. The battery pack will need to be
recharged before use.

Labels on Charger and Battery Pack

In addition to the pictographs used in this manual, the labels
on the charger and the battery pack may show the following
pictographs:

Read instruction manual before use.

See Technical Data for charging time.

Do not probe with conductive objects.

Do not charge damaged battery packs.

Do not expose to water.

Have defective cords replaced immediately.

Charge only between 4 ˚C and 40 ˚C.

Only for indoor use.

Discard the battery pack with due care for the
environment.

Charge DeWALT battery packs only with
designated D

eWALT chargers. Charging

battery packs other than the designated
DeWALT batteries with a DeWALT charger may
make them burst or lead to other dangerous
situations.

Do not incinerate the battery pack.

Battery Type

The DCM571 operates on a 54 volt battery pack.
These battery packs may be used: DCB546, DCB547. Refer to

Technical Data for moreinformation.

Package Contents

The package contains:
1 String trimmer
1 Auxiliary handle
4 Auxiliary handle screws
1 Strap
1 Guard
4 Guard screws
1 Brush cutter blade
1 Brush cutter nut
1 Brush cutter clamp washer
1 Brush cutter drive washer
5 Cotter pins
1 Nut wrench
1 Rod, lock
1 Blade cover
1 Battery (not for DCM571N)
1 Charger (not for DCM571N)
1 Instruction manual

• Check for damage to the tool, parts or accessories which
may have occurred duringtransport.

10

English

15m/49ft

15m/49ft

• Take the time to thoroughly read and understand this
manual prior tooperation.

Markings on Tool

The following pictograms are shown on the tool:

Read instruction manual before use.

Wear ear protection.

Wear eye protection.

Do not expose the tool to rain or high
humidity or leave outdoors while it is
raining.

Switch the tool off. Before performing
any maintenance on the tool, remove the
battery from the tool.

Wear head protection.

Wear slip-resistant footwear.

Wear slip-resistant gloves.

15m/49ft

Keep people and animals at least 15 m
away from the work area.

Do not use circular metal blades.

Beware of thrown objects.

Beware of blade thrust.

Keep bystanders away.

Directive 2000/14/EC guaranteed sound

96

power.

Date Code Position (Fig. U)

The date code
manufacture, is printed into thehousing.

Example:

45

which also includes the year of

2016 XX XX

Year of Manufacture

Description (Fig. A)

WARNING: Never modify the power tool or any part of
it. Damage or personal injury couldresult.



1

Variable speed trigger

2

Lock-off lever

3

Lock-off tab

4

Handle

5

Speed control switch

6

Auxiliary handle

7

Motor housing

8

Trimmer pole

9

Strap mount

10

Strap

11

Guard

12

Spool housing

13

Battery housing

14

Battery pack

15

Battery release button

16

Brush cutter blade

17

Nut wrench

18

Blade cover

Intended Use

Your string trimmer / brush cutter has been
designed for professional trimming applications.

DO NOT use under wet conditions or in the
presence of flammable liquids or gases.

DO NOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
thistool.

• Young children and the infirm. This appliance is not
intended for use by young children or infirm persons
without supervision.

• This product is not intended for use by persons
(including children) suffering from diminished
physical, sensory or mental abilities; lack of experience,
knowledge or skills unless they are supervised by a
person responsible for their safety. Children should never
be left alone with thisproduct.

11

English

ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack



before making any adjustments or removing/
installing attachments or accessories. An

accidental start-up can causeinjury.

WARNING: Use only DeWALT battery packs



andchargers.

Inserting and Removing the Battery Pack
from the Tool (Fig. C, D)

NOTE: Make sure your battery pack

To Install the Battery Pack into the Tool

1. Align the battery pack
(Fig. C).

2. Slide it in until the battery pack is firmly seated in the
tool and ensure that you hear the lock snap intoplace.

To Remove the Battery Pack from the
Tool

1. Press the release button
pack out of the toolhandle.

2. Insert battery pack into the charger as described in the
charger section of thismanual.

Fuel Gauge Battery Packs (Fig. E)

Some DeWALT battery packs include a fuel gauge which
consists of three green LED lights that indicate the level of
charge remaining in the batterypack.

To actuate the fuel gauge, press and hold the fuel gauge

19

button
illuminate designating the level of charge left. When the
level of charge in the battery is below the usable limit, the
fuel gauge will not illuminate and the battery will need to
berecharged.

NOTE: The fuel gauge is only an indication of the charge left
on the battery pack. It does not indicate tool functionality
and is subject to variation based on product components,
temperature and end-userapplication.

. A combination of the three green LED lights will

7

is fullycharged.

14

with the rails inside the tool

15

and firmly pull the battery

Assembly (Fig. F - I)

Removing spool housing (Fig. F, G)

1. Insert the rod
trimmer drive washer (small)
in the motor housing

2. Turn the spool housing

3. Remove the spool housing and the drive washer from
the trimmer.

46

through the hole

7

as shown in figure F.

12

Attaching guard (Fig. H, I)

WARNING: Never operate appliance without guard
firmly in place. Damage or personal injury could result.



21

in the string

20

and into the hole

clockwise as shown in figureG.

22

1. Remove the spool housing
"Removing the spool housing" section.

2. To attached the guard, slide the tab
under the lip
the back of the guard into place as shown in figureH.

3. Replace and securely tighten the 4 guard screws
with the wrench

4. Replace the spool housing as described in the "Attaching
Spool Housing" section below.

24

of the motor housing

17

12

as described in the

23

as shown in figure I.

of the guard

7

Attaching spool housing (Fig I, J)

1. Slide the string trimmer drive washer (small)
over the the bolt
that its hole
housing

2. Rotate the washer and motor housing until their holes
line up with the notch

3. Insert a screwdriver through the three holes, thread the
spool housing counterclockwise, and securely tighten
onto the bolt.

26

protruding from the trimmer so

21

lines up with the hole

7

.

27

in the guard

22

11

Attaching blade (Fig. K)

WARNING: Risk of injury. Brush cutter blade has sharp
edges. Wear gloves when handling blade.



1. Remove the spool housing
drive washer (small)
the spool housing" section.

2. Slide the brush cutter drive washer (large)
over the the bolt
that its hole
housing

3. Slide the brush cutter blade
so that the inner, non-cutting edge
hole of the drive washer. This will allow for easier and
safer removal of the blade later.

4. Slide the brush cutter clamp washer
blade so that the wider side is flat against the blade.

5. Screw the brush cutter nut
wrench

6. Slide the cotter pin

29

lines up with the hole

7

.

17

. Ensure the nut is securely tightened.

12

and the string trimmer

20

as described in the "Removing

26

protruding from the trimmer so

16

32

33

fully through the hole in the bolt.

22

on top of drive washer

30

lines up with the

31

on top of the

onto the bolt with the

Attaching auxiliary handle (Fig. L)

1. Place the auxiliary handle

8

pole

above the label placed in the middle fo the pole.

2. Slide the bracket
bottom of the handle.

3. Thread the handle bolts
into the handle.

4. Tighten the handle bolts with the wrench
the handle is securely attached.

If adjustment is necessary, loosen the handle bolts and slide
the auxiliary handle up or down the trimmer pole. Then,
retighten the bolts.

6

onto the top of the trimmer

34

of the auxiliary handle into the

35

through the bracket and

, then lower

25

20

down

in the motor

.

28

down

in the motor

17

. Ensure

12

English

Replacing guard (Fig. M)

1. Remove the spool housing
"Removing the spool housing" section.

2. Remove the 4 guard screws

3. Lift the guard off at an angle as shown in figureM.

4. Install the new guard as described in the "Attaching
guard" section.

Attaching strap

Hook the strap
one shoulder for extra support while using the trimmer or
brush cutter.

10

to the strap mount

12

as described in the

25

shown in figureL.

9

and place strap on

OPERATION

Instructions for Use

WARNING: Always observe the safety instructions and
applicableregulations.



WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack



before making any adjustments or removing/
installing attachments or accessories. An

accidental start-up can causeinjury.

Proper Hand Position (Fig. O)

WARNING: To reduce the risk of serious personal
injury, ALWAYS use proper hand position asshown.



WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of a



suddenreaction.

Proper hand position requires one hand on the handle
with the other hand on the auxiliary handle

6

4

.

,

Switching On

To turn the appliance on, push the lock off tab
squeeze the lock-off lever
speed trigger

To turn the appliance off, release the variable speed trigger,
the lock-off lever, and tab.

1

2

.

, and then squeeze the variable

3

forward,

Speed Control Switch

This string trimmer gives you the choice to operate at a
more efficient speed to extend the runtime for larger jobs, or
accelerate the trimmer speed for high-performance cutting.

To extend runtime, push the speed control switch
toward the auxiliary handle
is best for larger projects that require more time to complete.

To accelerate the trimmer, pull the speed control switch
back toward the battery housing
This mode is best to cut through heavier growth and for
applications that need higher RPM.

NOTE: When in "HI" mode, runtime will be decreased as
compared to when trimmer is in "LO" mode.

6

into the "LO" position. This mode

13

into the "HI" position.

5

forward

Trimming / Brush cutting (Fig. N, O)

With the trimmer on, angle it and swing side to side as
shown in figureN.

Maintain a minimum distance of 610 mm between the
guard and your feet as shown in figure O.

WARNING: Keep the rotating string roughly parallel
with the ground (tilted no more than 30 degrees). This



trimmer is not an edger. DO NOT TILT the trimmer so
that the string or brush cutter blade
near a right angle to the ground. Flying debris can
cause serious injury.

16

is spinning

Bump Feed Trimmer Line Feed

WARNING: To avoid personal injury, never bump the
unit when the brush cutter assembly is attached to the



motor housing.

Your trimmer uses 2.032 mm diameter nylon line. Cutting
line will wear faster and require more feeding if the cutting
is done along sidewalks or other abrasive surfaces or heavier
weeds are being cut.

As you use the trimmer, the string will get shorter due
to wear. Gently bump the trimmer on the ground while
running at normal speed and the line will feed.

NOTE: Extending nylon line beyond the 330mm swath
will negatively affect performance, runtime, and the life of
the trimmer due to potential of damaging motor. Doing so
may void the warranty.

Helpful Cutting Tips

• Use the tip of the string to do the cutting; do not force
string head into uncut grass.

• Wire and picket fences cause extra string wear, even
breakage. Stone and brick walls, curbs, and wood may
wear string rapidly.

• Do not allow spool cap to drag on ground or other surfaces.

• In long growth, cut from the top down and do not
exceed 304.8 mm high.

• Keep trimmer tilted toward the area being cut; this is the
best cutting area.

• The trimmer cuts when passing the unit from the left to
right. This will avoid throwing debris at the operator.

• Avoid trees and shrubs. Tree bark, wood moldings, siding,
and fence posts can easily be damaged by the string.

Replacement Accessories

WARNING: To reduce the risk of serious personal
injury, turn appliance off and remove battery before



making any adjustments or removing/installing
attachments or accessories.

WARNING: The use of any accessory not
recommended by D



could be hazardous.

eWALT for use with this appliance

13

English

WARNING: Do not use any blades, or any accessory
or attachment other than those recommended by



DeWALT on this trimmer. Serious injury or product
damage may result.

Use

DeWALT

DT20651 (2mm), DT20652 (2.5mm).

• For optimal performance, use Dewalt DT20650/51. D

Use
255mm (Tri-Blade Brush Knife), DT20654 (255mm Grass
Cutting Blade), DT20655 (230mm 4T Grass Cutting Blade).

replacement line Model No. DT20650 (2mm),

DT20652 can also be use but may degrade runtime of the
trimmer. Using any other line with the trimmer can degrade
performance and/or cause damage to the trimmer.

DeWALT

replacement

blades Model No. DT20653

eWALT

Replacing the Cutting Line (Fig. P–S)

CAUTION: To avoid appliance damage, if the cutting
line protrudes beyond the trimming blade, cut it off so



that it just reaches the blade.

1. Remove battery.

2. Turn spool
The white nub
the spool window

3. Pull the spool straight out to remove.

4. Remove any dirt and grass from the spool and housing.

5. First, wind new line in the channel of the spool closest to
the holding slots

6. Place the end of the cutting line
hole

7. Wind the cutting line onto the spool in the direction of
the arrow on the bottom of the spool.

8. When the wound cutting line reaches the beginning of
the holding slots, cut the line approximately 106mm.

9. Push the line in the holding slots on one side of the spool
to hold the first line while you wind the second line.

10. Repeat the above procedure for the second cutting line
on the lower section of the spool.

11. Once both lines are wrapped around the spool
place your thumb and finger on the holding slots to
further secure the string and feed the end of each line
through the two holes
the spool housing

12. Line up the white nubs
with the recesses
slots

13. Push the spool into the spool housing and turn
counterclockwise to lock the spool in place. Ensure the white
nub appears in the spool window
doesn't unravel and wrap around the shaft below the spool.

36

clockwise to unlock as shown in figure P.

37

inside the spool will rotate away from

38

to indicate it is unlocked.

39

as shown in figure Q.

40

41

.

CAUTION: Before you begin trimming, only use the
appropriate type of cutting line. Ensure that cutting line is



present in both sections of the spool as shown in Figure R.

43

12

as shown in figure S.

37

42

39

with the two holes

of the spool. Align the holding

into the retaining

36

on either side of the head in

inside the spool housing

43

as close as possible.

38

. Make sure the line

,

14. Pull both ends of the cutting line to release them from the
holding slots. If the line extends past the cutting blade on
the guard cut the line so it just reaches the blade.

MAINTENANCE

Your DeWALT power tool has been designed to operate
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regularcleaning.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack



before making any adjustments or removing/
installing attachments or accessories. An

accidental start-up can causeinjury.

1. Keep the air intake slots
avoid overheating.

2. Your trimmer line can dry out over time. To keep your
line in top condition, store spare line in a plastic, sealable
bag with a tablespoon of water.

3. Plastic parts may be cleaned by using a mild soap and a
damp rag.

4. The line cutter on the edge of the guard can dull over
time. It is recommended you periodically touch-up the
sharpness of the blade with a file.

The charger and battery pack are notserviceable.

44

, shown in figure T, clean to

Lubrication

Your power tool requires no additional lubrication.

Cleaning

WARNING: Blow dirt and dust out of the main
housing with dry air as often as dirt is seen collecting



in and around the air vents. Wear approved eye
protection and approved dust mask when performing
thisprocedure.

WARNING: Never use solvents or other harsh
chemicals for cleaning the non-metallic parts of the



tool. These chemicals may weaken the materials used
in these parts. Use a cloth dampened only with water
and mild soap. Never let any liquid get inside the tool;
never immerse any part of the tool into aliquid.

Optional Accessories

WARNING: Since accessories, other than those offered
by DeWALT, have not been tested with this product, use



of such accessories with this tool could be hazardous.
To reduce the risk of injury, only D
accessories should be used with thisproduct.

Consult your dealer for further information on the
appropriateaccessories.

eWALT recommended

14

Protecting the Environment

Separate collection. Products and batteries marked
with this symbol must not be disposed of with
normal household waste.

Products and batteries contain materials that can be
recovered or recycled reducing the demand for raw materials.
Please recycle electrical products and batteries according to local
provisions. Further information is available at www.2helpU.com.

Rechargeable Battery Pack

This long life battery pack must be recharged when it fails
to produce sufficient power on jobs which were easily done
before. At the end of its technical life, discard it with due care
for our environment:

• Run the battery pack down completely, then remove it

from the tool.

• Li-Ion cells are recyclable. Take them to your dealer or a

local recycling station. The collected battery packs will
be recycled or disposed of properly

English

15

161718

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en Luxemburg

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España D

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Schweiz
Suisse
Svizzera

Ireland D

Italia D

Nederlands D

Norge D

Österreich D

Portugal D

Suomi D

Sverige D

Türkiye

United
Kingdom

Australia D

Middle East Africa D

DeWALT - Belgium BVBA
Egide Walschaertsstraat 16
2800 Mechelen

eWA LT

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N501279 1/17